<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
       <el-alert
          title="添加商品信息"
          type="info"
          center
          show-icon
          :closable="false">
        </el-alert>
        <el-steps :active="activeIndex - 0" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <!-- tab 栏 -->
        <el-tabs :tab-position="'left'"  v-model="activeIndex"
        :before-leave="beforeTabLeave"
        @tab-click="tabClicked">
        <!-- tab 窗格- 基本信息 -->
        <el-tab-pane label="基本信息" name="0">
          <!-- 表单 -->
          <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
              v-model="addForm.goods_cat"
              :options="cateList"
              :props="cateProps"
              @change="handleChange"></el-cascader>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品参数" name="1">
          <!-- 渲染表单的 item 项 -->
          <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
            <!-- 复选框组 -->
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox border :label="cb" v-for="(cb, i) in item.attr_vals" :key="i"></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
          <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
            <el-input v-model="item.attr_vals"></el-input>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
          <!-- action表示图片上传的后台api -->
          <el-upload
            :action="uploadURL"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            list-type="picture"
            :headers="headersObj"
            :on-success="handleSuccess">
            <el-button size="small" type="primary">点击上传</el-button>
            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
          </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
          <!-- 富文本编辑器组件 -->
          <quill-editor
            v-model="addForm.goods_introduce"
          />
          <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
        </el-tab-pane>
      </el-tabs>
        
      </el-form>
      
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="PreviewDialogVisible"
      width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      addForm:{
        goods_name:'',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        // 图片的数组[]
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          {
            required: true, message: '请输入商品名称',trigger: 'blur'
          }
        ],
        goods_price:[
          {
            required: true, message: '请输入商品价格', trigger: 'blur'
          },
        ],
        goods_weight: [
          {
            required: true, message: '请输入商品重量',trigger: 'blur'
          }
        ],
        goods_number: [
          {
            required: true, message: '请输入商品数量', trigger: 'blur'
          }
        ],
        goods_cat: [
          {
            required: true, message: '请选择商品分类', trigger: 'blur'
          }
        ]
      },
      // 商品分类数据列表
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表
      onlyTableData: [],
      // 上传图片的url地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      // 对话框隐藏
      PreviewDialogVisible: false,

    }
  },
  created(){
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类
    async getCateList () {
      const {data: res} = await this.$http.get('categories')
      if(res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      // this.$message.success('获取商品分类数据成功！')
      // console.log(res.data);
      this.cateList = res.data
    },
    // 级联选择器选中项改变，会触发这个函数
    handleChange() {
      // console.log(this.addForm.goods_cat);
      if(this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
      // this.addForm.goods_cat.join(',')
    },
    // 
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页的名称为：'+ oldActiveName);
      // console.log('即将进入的标签页的名称为：'+ activeName);
      if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    // 监听标签页被点击的事件
    async tabClicked(a) {
      // console.log(a);
      // console.log(this.activeIndex);
      // 激活的面板的数据为1
      if(this.activeIndex ===  '1') {
        console.log('动态参数面板');
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
          params: {
            sel: 'many' 
          }
        })
        if(res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
        // console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals === '' ? [] : item.attr_vals.split(',')
        })
        this.manyTableData = res.data
        console.log('manyTableData', this.manyTableData);
        // 商品属性 tab
      } else if(this.activeIndex ===  '2') {
        console.log('静态参数面板');
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
          params: {
            sel: 'only'
          }
        })
        if(res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败！')
        }
        console.log(res.data)
        // res.data.forEach(item => {
        //   item.attr_vals = item.attr_vals === '' ? [] : item.attr_vals.split(',')
        // })
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      console.log(file);
      this.previewPath = file.response.data.url;
      this.PreviewDialogVisible = true

},
    // 处理移除图片操作
    handleRemove(file) {
      console.log(file);
      // 1.获取将要删除的图片的临时路径
      const filepath = file.response.data.tmp_path
      // 2.从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filepath)
      // 3.调用数组的splice 方法，把图片信息对象，从 pics 数组中移除
      // splice() 方法向/从数组添加/删除项目，并返回删除的项目。
      // splice() 方法会改变原始数组。
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm.pics);
    },
    // 处理图片上传
    handleSuccess(response) {
      console.log(response);
      // 1.拼接得到一个图片信息对象
      const picInfo = {
        pic: response.data.tmp_path
      }
      // 2.将图片信息对象，push到pics数组中
      // push() 方法向数组末尾添加新项目，并返回新长度。
      this.addForm.pics.push(picInfo)
      console.log('addform',this.addForm);
    },
    // 点击添加商品按钮，触发的点击事件
    add() {
      console.log('addFrom',this.addForm);
      this.$refs.addFormRef.validate(async valid => {
        if(!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        // loadash 
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        console.log('manyTableData',this.manyTableData);
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(',')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态参数
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
        this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form);
        // 发起请求添加商品
        // 商品的名称，必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        console.log('res', res);
        if(res.meta.status !== 201) {
          return this.$message.error('添加商品失败！' + res.meta.msg)
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if(this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>
